FILE—In this file photo from Sept. 5, 2013, Jack Hanna stands at the front entrance of the Columbus Zoo and Aquarium in Powell, Ohio. The family of the celebrity zookeeper and frequent talk-show guest said Wednesday, April 7, he’s been diagnosed with dementia and will retire from public life. His family said in a news release it’s believed he now has Alzheimer’s disease and it has progressed very quickly in the last few months. The 74-year-old Hanna was director of the Columbus Zoo from 1978 to 1992. (Tom Dodge/The Columbus Dispatch via AP, File)